package com.routz.nettydemo.pojodemo.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.serialization.ClassResolvers;
import io.netty.handler.codec.serialization.ObjectDecoder;
import io.netty.handler.codec.serialization.ObjectEncoder;

/**
 * 订票客户端
 */
public class BookTicketClient {

    public void connect(int port, String host) throws Exception {
        //配置客户端线程组
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            //配置客户端启动辅助类
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioSocketChannel.class)
                    .option(ChannelOption.TCP_NODELAY, true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            //添加POJO对象解码器 禁止缓存类加载器
                            ch.pipeline().addLast(new ObjectDecoder(1024, ClassResolvers.cacheDisabled(this.getClass().getClassLoader())));
                            //设置发送消息编码器
                            ch.pipeline().addLast(new ObjectEncoder());
                            //设置网络IO处理器
                            ch.pipeline().addLast(new BookTicketClientHandler());
                        }
                    });

            //发起异步服务器连接请求 同步等待成功
            ChannelFuture f = b.connect(host, port).sync();
            //等到客户端链路关闭
            f.channel().closeFuture().sync();
        } finally {
            //优雅释放线程资源
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws Exception {
        new BookTicketClient().connect(8000, "127.0.0.1");
    }

}
